I wonder if Stellar Fox, in addition to receiving the DD from his DXD counterpart, will receive a blessing from Beel or Ophis that allows him to use their chakra to convert into another source of energy as dxd magic o devil magic or perhaps awaken his Outsuki bloodline before Hagoromo. Although I wonder if he'll also receive a sword as a gift based on Excaliburn Morgan, which perhaps has a spirit based on Artoria. I wouldn't be surprised if Hilda's faction had their own Excaliburn, which she gave away only because Beel likes her father's counterpart.
This way, Naruto would have a weapon, and we could avoid the collaboration without losing anything, since the collaboration with Fate was the one that made you lose motivation in HSR. Naruto having Excaliburn is just a small reference to Fate, but Fate won't have his own arc in Stellar Fox.
Although, honestly, the DXD world is the one I find easiest for Stellar Naruto to survive. If Naruto lands in that world and meets that world's Kushina, she'll surely be surprised by Stellar Naruto's appearance. Though I imagine he'll be taken care of when he suffers from the clone's memory overload with Acheron and then wakes up thinking about Sixth Street Naruto, only to encounter DXD Naruto with Beel, remembering Acheron's words about meeting people with similar faces.